Answer:
The 95% confidence interval for the mean change in blood pressure, , is 1.744 < < 2.816
Step-by-step explanation:
The parameters given are;
The number of people in the sample, n = 9
The average drop in blood pressure, = 2.28 points
The standard deviation, σ = 0.82
The confidence level = 95%
The formula for confidence interval with a known mean is given as follows;
Where:
= z - score at 95% confidence level = 1.96
We therefore have;
Which gives the 95% confidence interval for the mean change in pressure, , is given as follows;
1.744 < < 2.816
Four friends go out to lunch and they agree to split the bill evenly.
so now you have to divide the price by 4 because there's four people.
$48.20. / 4.
so your answer is $12.05 that's so much each person will pay for their share of bill.
i could be wrong, was kinda in a rush
Answer:
2. C
Step-by-step explanation:
Mark me as brainliest
Answer:
a=72
Step-by-step explanation:
54/3=18
18*4=72
a=72 when b=4